Electric riding lawn mower

ABSTRACT

An electric riding lawn mower includes a seat for a user to ride, a main frame to support the seat, a power output assembly including a mowing element to output power to realize mowing function and a first motor to drive the mowing element, a walking assembly to at least drive the electric riding lawn mower to travel in the direction of a first straight line on the ground and a second motor to drive the walking assembly, and a power supply device to power the electric riding lawn mower with a first battery pack, which includes a first battery pack housing and a plurality of battery cells disposed therein. The power supply device is mounted to the main frame. At least one of the first battery packs of the power supply device forms a pluggable connection with the main frame. The battery cells are lithium batteries.

RELATED APPLICATION INFORMATION

This application is a continuation of U.S. application Ser. No.17/825,298, filed on May 26, 2022, which application is a continuationof U.S. application Ser. No. 16/909,549, filed on Jun. 23, 202, whichapplication is a continuation of International Application NumberPCT/CN2018/123856, filed on Dec. 26, 2018, through which thisapplication also claims the benefit under 35 U.S.C. § 119(a) of ChinesePatent Application No. CN 201711457168.5, filed on Dec. 28, 2017, andChinese Patent Application No. CN 201810885961.3, filed on Aug. 6, 2018,each of which is incorporated by reference in its entirety herein.

TECHNICAL FIELD

The present disclosure relates to an electric riding machine, inparticular to an electric riding lawn mower.

BACKGROUND

As a garden tool, lawn mowers are widely used in the field of trimminglawn and vegetation, etc. Existing lawn mowers generally includehandheld lawn mowers and riding lawn mowers. Among them, handheld lawnmowers are widely used because of its advantages such as small size andconvenient portability. However, mowing capacity, mowing efficiency, andbattery life of handheld lawn mowers cannot meet the needs of large lawnareas. Therefore, a kind of electric riding lawn mowers has graduallyemerged on the market. However, the riding lawn mowers currently on themarket are generally powered by gasoline or diesel, which not onlypollutes the environment and goes against environmental protection, butalso incurs increased maintenance costs because the wearing parts in thefuel system needs to be replaced frequently.

SUMMARY

In one example, an electric riding lawn mower includes a seat for a userto ride; a main frame configured to support the seat; a power outputassembly including a mowing element for outputting power to realize amowing function and a first motor for driving the mowing element tooutput power; a walking assembly configured to at least drive theelectric riding lawn mower to travel in a first straight line on theground and including a second motor to drive the walking assembly; and apower supply device including one or more first battery packs to powerthe electric riding lawn mower; wherein each of the one or more firstbattery packs including: a first battery pack housing; and battery cellsdisposed in the first battery pack housing; wherein the power supplydevice is mounted to the main frame, and at least one of the one or morefirst battery packs of the power supply device forms a pluggableconnection with the main frame, and the battery cells are lithiumbatteries.

In one example, the one or more first battery packs detachably coupledto the main frame are also configured to power another power tool.

In one example, a discharge power of all of the one or more firstbattery packs included in the power supply device is greater than orequal to 2000 W and less than or equal to 4000 W.

In one example, a ratio of the discharge power of a single one of theone or more first battery packs to the nominal voltage of a single oneof the one or more first battery packs is greater than or equal to 10W/V and less than or equal to 25 W/V.

In one example, the capacity of a single one of the one or more firstbattery packs is greater than or equal to 130 Wh and less than or equalto 1000 Wh, and a number of the one or more first battery packs includedin the power supply device is greater than or equal to 4 and less thanor equal to 10.

In one example, the weight of a single one of the one or more firstbattery packs is greater than or equal to 0.1 kg and less than or equalto 4 kg, and a number of the one or more first battery packs included inthe power supply device is greater than or equal to 4 and less than orequal to 10.

In one example, the discharge power of a single one of the one or morefirst battery packs is greater than or equal to 500 W and less than orequal to 6500 W, and a number of the one or more first battery packsincluded in the power supply device is greater than or equal to 4 andless than or equal to 10.

In one example, the walking assembly includes: a first travelling wheelhaving a first diameter; and a second travelling wheel having a seconddiameter greater than the first diameter; wherein the power supplydevice includes: at least one first battery compartment disposed on therear side of the seat; wherein a number of the at least one firstbattery compartments is one or more; and wherein in a direction of thefirst straight line, a distance between a center of a whole constitutedby all of the at least one first battery compartments disposed on therear side of the seat along the direction of the first straight line anda rotating shaft of the second travelling wheel is less than or equal to300 mm.

In one example, the walking assembly includes: a first travelling wheelhaving a first diameter; and a second travelling wheel having a seconddiameter greater than the first diameter; wherein the power supplydevice includes: at least one first battery compartment disposed on therear side of the seat; wherein a number of the at least one firstbattery compartments is two; and wherein in a direction of the firststraight line, a distance between a center of a whole constituted by allof the at least one first battery compartments disposed on the rear sideof the seat along the direction of the first straight line and arotating shaft of the second travelling wheel is less than or equal to300 mm.

In one example, the walking assembly includes: a first travelling wheelhaving a first diameter; and a second travelling wheel having a seconddiameter greater than the first diameter; wherein the power supplydevice includes: at least one first battery compartment disposed on therear side of the seat; wherein a number of the first batterycompartments is one or more; and wherein in a horizontal directionperpendicular to the rotation axis of the second travelling wheel, adistance between a center of a whole constituted by all of the at leastone first battery compartments disposed on the rear side of the seatalong the horizontal direction and a rotating shaft of the secondtravelling wheel is less than or equal to 300 mm.

In one example, the walking assembly includes: a first travelling wheelrotatable about a first axis; and a second travelling wheel rotatableabout a second axis; wherein the first travelling wheel having a firstdiameter, and the second travelling wheel having a second diametergreater than the first diameter; wherein the power supply deviceincludes: at least one first battery compartment disposed on the rearside of the seat; wherein a number of the at least one first batterycompartments is one or more; and wherein in a direction perpendicular tothe first straight line and perpendicular to the second axis, a distancebetween a center of a whole constituted by all of the at least one firstbattery compartments disposed on the rear side of the seat and thesecond axis is less than or equal to 300 mm.

In one example, the walking assembly includes: a first travelling wheelrotatable about a first axis; and a second travelling wheel rotatableabout a second axis; wherein the first travelling wheel having a firstdiameter, and the second travelling wheel having a second diametergreater than the first diameter; wherein the power supply deviceincludes: at least one first battery compartment disposed on the rearside of the seat; wherein a number of the at least one first batterycompartments is one or more; wherein in a direction parallel to thesecond axis, a distance between a center of a whole constituted by allof the at least one first battery compartments disposed on the rear sideof the seat and a center of two second travelling wheels is less than orequal to 300 mm.

In one example, the walking assembly includes: a first travelling wheelhaving a first diameter; and a second travelling wheel having a seconddiameter greater than the first diameter; wherein the power supplydevice includes: a first battery compartment set including one or morefirst battery compartments, wherein the one or more first batterycompartment are disposed on the rear side of the seat, and the one ormore first battery compartment are used for detachably mounting the oneor more first battery packs, and the one or more first battery packs arefurther configured to power another power tool; wherein a number of theone or more first battery compartments are one or more, and the powersupply device is disposed on the rear side of the seat; and wherein inthe a of the first straight line, a distance between a center of gravityof the power supply device to which the one or more first battery packsare mounted and a rotating shaft of the second travelling wheel is lessthan or equal to 300 mm.

In one example, the walking assembly includes: a first travelling wheelhaving a first diameter; and a second travelling wheel having a seconddiameter greater than the first diameter; wherein the power supplydevice includes: a first battery compartment set including one or morefirst battery compartments, wherein the one or more first batterycompartments are disposed on the rear side of the seat, the one or morefirst battery compartments are used for detachably mounting the one ormore first battery packs, and the one or more first battery packs arefurther configured to power another power tool; wherein a number of theone or more first battery compartments is one or more, and the powersupply device is disposed on the rear side of the seat; and wherein in ahorizontal direction perpendicular to a rotation axis of the secondtravelling wheel, a distance between a center of gravity of the powersupply device to which the one or more first battery packs are mountedand a rotating shaft of the second travelling wheel is less than orequal to 300 mm.

In one example, the walking assembly includes: a first travelling wheelrotatable about a first axis; and a second travelling wheel rotatableabout a second axis; wherein the power supply device includes: a firstbattery compartment set including one or more first batterycompartments, wherein the one or more first battery compartments aredisposed on the rear side of the seat, the one or more first batterycompartment are used for detachably mounting the one or more firstbattery packs, and the one or more first battery packs are furtherconfigured to power another power tool; wherein a number of the one ormore first battery compartments are one or more, and the power supplydevice is disposed on the rear side of the seat; and wherein in adirection perpendicular to the first straight line and perpendicular tothe second axis, a distance between a center of gravity of a whole ofthe power supply device to which the one or more first battery packs aremounted and the second axis is less than or equal to 300 mm.

In one example, an electric riding lawn mower including: a seat for auser to ride; a main frame to support the seat; a power output assemblyincluding a mowing element for outputting power to realize a mowingfunction and a first motor for driving the mowing element to outputpower; a walking assembly configured to at least drive the electricriding lawn mower to travel in a first straight line on the ground andincluding a second motor to drive the walking assembly; and a powersupply device including at least one first battery compartment to coupleto a battery pack; wherein the at least one first battery compartment ismounted to the main frame, the at least one first battery compartment isused for pluggable coupling to the battery pack, the at least one firstbattery compartment is further provided with input terminals to bring inelectrical energy to the electric riding lawn mower.

In one example, a number of the at least one first battery compartmentis greater than or equal to 4 and less than or equal to 10.

In one example, the walking assembly included: a first travelling wheelhaving a first diameter; and a second travelling wheel having a seconddiameter greater than the first diameter; wherein a number of the atleast one first battery compartment is one or more; and wherein in adirection of the first straight line, a distance between the center of awhole constituted by all of the at least one the first batterycompartment disposed on the rear side of the seat along the direction ofthe first straight line and a rotating shaft of the second travellingwheel is less than or equal to 300 mm.

In one example, the walking assembly includes: a first travelling wheelrotatable about a first axis; and a second travelling wheel rotatableabout a second axis; wherein the first travelling wheel has a firstdiameter, and the second travelling wheel has a second diameter greaterthan the first diameter; wherein a number of the at least one firstbattery compartment is one or more; wherein in a direction perpendicularto the first straight line and perpendicular to the second axis, adistance between a center of a whole constituted by all of the at leastone first battery compartment disposed on the rear side of the seat andthe second axis is less than or equal to 300 mm.

In one example, the walking assembly includes: a first travelling wheelrotatable about a first axis; and a second travelling wheel rotatableabout a second axis; wherein the first travelling wheel has a firstdiameter, and the second travelling wheel has a second diameter greaterthan the first diameter; wherein a number of the at least one of firstbattery compartment is one or more; and wherein in a direction parallelto the second axis, a distance between the center of a center of a wholeconstituted by all of the at least one first battery compartmentdisposed on the rear side of the seat and a center of two secondtravelling wheels is less than or equal to 300 mm.

In one example, an electric riding machine including: a seat for a userto ride; a main frame to support the seat; a power output assemblyincluding a mowing element for outputting power to realize a mowingfunction and a first motor for driving the mowing element to outputpower; a walking assembly configured to at least drive the electricriding lawn mower to travel in a first straight line on the ground andincluding a second motor to drive the walking assembly; and a powersupply device including at least one first battery pack to power theelectric riding machine; wherein the power supply device is mounted tothe main frame, at least one of the at least one first battery pack ofthe power supply device form a detachable connection with the mainframe, and the at least one first battery pack detachably connected withthe main frame is also configured to power another power tool.

In one example, the walking assembly includes: a first travelling wheelrotatable about a first axis; and a second travelling wheel rotatableabout a second axis.

In one example, the first travelling wheel has a first diameter, and thesecond travelling wheel has a second diameter greater than the firstdiameter.

In one example, the first travelling wheel is a universal wheel.

In one example, the main frame extends in a direction of the firststraight line.

In one example, the walking assembly includes: a first travelling wheelrotatable about a first axis; and a second travelling wheel rotatableabout a second axis; wherein the first travelling wheel has a firstdiameter, and the second travelling wheel has a second diameter largerthan the first diameter; and wherein in a direction of the firststraight line, a distance between a center of gravity of the electricriding machine and the second axis is greater than or equal to 0 andless than or equal to 400 mm.

In one example, a center of gravity of the electric riding machine islocated on the lower side of the seat.

In one example, the walking assembly includes: a first travelling wheelrotatable about a first axis; and a second travelling wheel rotatableabout a second axis; wherein the first travelling wheel has a firstdiameter, and the second travelling wheel has a second diameter largerthan the first diameter; and wherein in a direction of the firststraight line, a ratio of a distance between the center of gravity ofthe electric riding machine and the first axis to a distance between thecenter of gravity of the electric riding machine and the second axis isgreater than or equal to 2 and less than or equal to 4.

In one example, the walking assembly includes: a first travelling wheelrotatable about a first axis; and a second travelling wheel rotatableabout a second axis; wherein the first travelling wheel has a firstdiameter, and the second travelling wheel has a second diameter largerthan the first diameter; and wherein in a direction perpendicular to thefirst straight line and perpendicular to the second axis, a distancebetween a center of gravity of the electric riding machine and thesecond axis is greater than or equal to 0 and less than or equal to 150mm.

In one example, the walking assembly includes: a first travelling wheelhaving a first diameter; and a second travelling wheel having a seconddiameter greater than the first diameter; wherein the power supplydevice includes: at least one first battery compartment disposed on therear side of the seat away from the first travelling wheel; wherein theat least one first battery pack of the power supply device is mounted tothe at least one first battery compartment, and a number of the at leastone first battery compartment is one or two or more; wherein in adirection of the first straight line, a distance between a center of awhole constituted by all of the at least one first battery compartmentdisposed on the rear side of the seat along the direction of the firststraight line and the second axis is less than or equal to 300 mm.

In one example, the walking assembly includes: a first travelling wheelrotatable about a first axis; and a second travelling wheel rotatableabout a second axis; wherein the first travelling wheel has a firstdiameter, and the second travelling wheel has a second diameter greaterthan the first diameter; wherein the power supply device includes: atleast one first battery compartment disposed on the rear side of theseat away from the first travelling wheel; wherein the at least onefirst battery pack of the power supply device is mounted to the at leastone first battery compartment, and a number of the at least one firstbattery compartment is one or more; and wherein in a directionperpendicular to the first straight line and perpendicular to the secondaxis, a distance between a center of a whole constituted by all of theat least one first battery compartment disposed on the rear side of theseat and the second axis is less than or equal to 300 mm.

In one example, the walking assembly includes: a first travelling wheelrotatable about a first axis; and a second travelling wheel rotatableabout a second axis; wherein a number of the second travelling wheels istwo, the two second travelling wheels are symmetrically disposed on bothsides of a symmetrical plane, and the user faces a forward direction ofthe electric riding machine when the user sits on the seat; wherein thepower supply device includes: at least one first battery compartmentdisposed on the rear side of the seat; and wherein a number of the atleast one first battery compartment is one or more, and a whole of allof the at least one first battery compartment disposed on the rear sideof the seat is symmetrically disposed about the symmetrical plane.

In one example, the user faces the forward direction of the electricriding machine when the user sits on the seat; wherein the power supplydevice includes: at least one first battery compartment disposed on therear side of the seat; the at least one first battery compartment isformed with a first groove, and the at least one first battery pack isdetachably inserted into the first groove in the direction of a secondstraight line.

In one example, the direction of the second straight line in which theat least one first battery pack is inserted into the first grooveintersects the direction of the first straight line obliquely.

In one example, the angle between the direction of the second straightline in which the at least one first battery pack is inserted into thefirst groove and the direction of the first straight line is greaterthan 60 degrees and less than 90 degrees.

In one example, the direction of the second straight line in which theat least one first battery pack is inserted into the first groove isperpendicular to the direction of the first straight line.

In one example, the direction of the second straight line in which thefirst battery pack is inserted into the first groove is parallel to thedirection of the first straight line.

In one example, the at least one first battery compartment is alsoformed with a locking structure for locking the at least one firstbattery pack on the at least one first battery compartment.

In one example, a vibration damping device is further disposed betweenthe power supply device and the main frame.

In one example, the at least one first battery pack includes a pluralityof battery cells, an extending direction of the battery cells isparallel to the direction of a second straight line in which the firstbattery pack is inserted into the first groove.

In one example, when the at least one first battery pack is insertedinto the first groove, the dimension in the direction of the firststraight line of a cross section of the first battery pack in a planeperpendicular to the direction of the second straight line is smallerthan the dimension of the cross section in the direction perpendicularto the first straight line and parallel to the plane.

In one example, at least one of the first battery pack of the powersupply device is fixedly mounted to the main frame.

In one example, the user faces the forward direction of the electricriding machine when the user sits on the seat, and the at least onefirst battery pack is disposed on the rear side of the seat; wherein thepower supply device further includes: a second battery pack disposed onthe lower side of the seat.

In one example, the electric riding machine is a lawn mower, and theoutput member is a mowing element.

In one example, an electric riding lawn mower including: a seat for auser to ride; a main frame to support the seat; a power output assemblyincluding a mowing element for outputting power to realize a mowingfunction and a first motor for driving the mowing element to outputpower; a walking assembly including a front travelling wheel and a reartravelling wheel configured to at least drive the electric riding lawnmower walking on the ground, and a second motor to drive the reartravelling wheel, wherein the rear travelling wheel has a rotatingshaft; and a power supply device including a first battery compartmentset, the first battery compartment set including one or more firstbattery compartments, at least a portion of the one or more firstbattery compartments being disposed on the rear side of the seat,wherein the one or more first battery compartments are for detachablymounting a first battery pack, and the first battery pack is furtherconfigured to power another power tool; wherein a horizontal distancebetween a center of all of the one or more first battery compartmentsdisposed on the rear side of the seat and a rotating shaft of the reartravelling wheel is less than or equal to 300 mm.

In one example, a vertical distance between a center of all of the oneor more first battery compartments disposed on the rear side of the seatand the rotating shaft of the rear travelling wheel is less than 300 mm.

In one example, the one or more first battery compartments disposed onthe rear side of the seat is disposed on the rear side of the reartravelling wheel.

In one example, at least one of the one or more first batterycompartments is disposed on the front side of the rear travelling wheeland under the seat.

In one example, all of the one or more first battery compartments arelocated on the rear side of the seat and on the rear side of therotating shaft of the rear travelling wheel.

In one example, a distance between a center of all of the one or morefirst battery compartments disposed on the rear side of the seat and acenter of a rotating shaft of the rear travelling wheel is less than 100mm in a left-right direction of the electric riding lawn mower.

In one example, an electric riding lawn mower including: a seat for auser to ride; a main frame to support the seat; a power output assemblyincluding a mowing element for outputting power to realize a mowingfunction and a first motor for driving the mowing element to outputpower; a walking assembly including a front travelling wheel and a reartravelling wheel configured to at least drive the electric riding lawnmower walking on the ground, and a second motor for driving the reartravelling wheel, wherein the rear travelling wheel has a rotatingshaft; and a power supply device including one or more first batterycompartments, at least a part of the one or more first batterycompartments being disposed on the rear side of the seat, wherein theone or more first battery compartments are for detachably mounting afirst battery pack, and the first battery pack is also configured topower another power tool; wherein a horizontal distance between a centerof gravity of the electric riding lawn mower to which the first batterypack is mounted and the rotating shaft of the rear travelling wheel isless than or equal to 500 mm.

In one example, a vertical distance between a center of gravity of theelectric riding lawn mower to which the first battery pack is mountedand a center of the rotating shaft of the rear travelling wheel is lessthan 300 mm.

In one example, the one or more first battery compartments disposed onthe rear side of the seat are disposed on the rear side of the reartravelling wheel.

In one example, at least one of the one or more first batterycompartments are disposed on the front side of the rear travelling wheeland under the seat.

In one example, all of the one or more first battery compartments arelocated on the rear side of the seat and on the rear side of the reartravelling wheel shaft.

In one example, a distance between a center of gravity of the electricriding lawn mower to which the first battery pack is mounted and acenter of the rotating shaft of the rear travelling wheel are less than100 mm in the lateral direction of the electric riding lawn mower.

In one example, an electric riding lawn mower including: a seat for auser to ride; a main frame to support the seat; a power output assemblyincluding a mowing element for outputting power to realize a mowingfunction and a first motor for driving the mowing element to outputpower; a walking assembly including a front travelling wheel and a reartravelling wheel configured to at least drive the electric riding lawnmower walking on the ground, and a second motor to drive the reartravelling wheel, wherein the rear travelling wheel has a rotatingshaft; and a power supply device including one or more first batterycompartments, at least a part of the one or more first batterycompartments being disposed on the rear side of the seat, wherein theone or more first battery compartments are used for detachably mountinga first battery pack, and the first battery pack is also configured topower another power tool; wherein when the first battery pack is mountedto the one or more first battery compartments, a upper portion of thefirst battery pack is substantially equal to or shorter than the seat ina height direction.

In one example, an electric riding lawn mower including: a seat for auser to ride; a main frame to support the seat; a power output assemblyincluding a mowing element for outputting power to realize a mowingfunction and a first motor for driving the mowing element to outputpower; a walking assembly including a front travelling wheel and a reartravelling wheel configured to at least drive the electric riding lawnmower walking on the ground, and a second motor for driving the reartravelling wheel, wherein the rear travelling wheel has a rotatingshaft; and a power supply device for providing power; wherein the powersupply device is disposed on the rear side of the seat, and a upper sideof the power supply device is substantially equal to or shorter than theseat in a height direction.

The present disclosure is advantageous in that the electric riding lawnmower of the present disclosure has high adaptability and low usagecost.

BRIEF DESCRIPTION OF DRAWINGS

FIG. 1 is a perspective view of an electric riding lawn mower of a firstexample of the present disclosure when a grass collecting device isinstalled;

FIG. 2 is a perspective view of the electric riding lawn mower of FIG. 1from another angle;

FIG. 3 is a plan view of a user riding the electric riding lawn mower ofFIG. 1 ;

FIG. 4 is a top view of the electric riding lawn mower of FIG. 1 ;

FIG. 5 is a schematic view of a power output assembly of FIG. 1 ;

FIG. 6 is a plan view of a user climbing uphill on an electric ridinglawn mower;

FIG. 7 is a schematic view showing a second travelling wheel and thecentre of gravity of the entirety formed by a user and an electricriding lawn mower;

FIG. 8 is a schematic structural view of a power tool system;

FIG. 9 is a schematic structural view of a first battery pack of FIG. 1;

FIG. 10 is a perspective view of the electric riding lawn mower of FIG.1 when a cover is opened;

FIG. 11 is a perspective view of the electric riding lawn mower of FIG.1 when a first battery pack is removed;

FIG. 12 is a top view of the structure shown in FIG. 11 ;

FIG. 13 is a plan view of an electric riding lawn mower of a secondexample of the present disclosure;

FIG. 14 is a plan view of an electric riding lawn mower of a thirdexample of the present disclosure;

FIG. 15 is a top view of an electric riding lawn mower of a fourthexample of the present disclosure.

DETAILED DESCRIPTION

The electric riding machine shown in FIG. 1 can be an electric machinefor working indoors or outdoors. In the present example, the electricriding machine is specifically exemplified by the electric riding lawnmower 100. The electric riding lawn mower 100 can be used for the userto ride. When sitting on the electric riding lawn mower, the user caneffectively and quickly trim lawn, vegetation, etc. by operating theelectric riding lawn mower. Comparing with walk behind lawn mowers, theelectric riding lawn mower 100 of the present disclosure does notrequire the user to push the machine, nor does it require the user towalk on the ground, and because its large size brings longer endurance,the user is able to trim larger lawns, and trim for a long time withless tiredness. Furthermore, when it comes to power source, the electricriding lawn mower 100 uses electrical energy rather than gasoline ordiesel used by existing riding lawn mowers; this not only costs less andis more environmental friendly, but also requires part replacement lessoften, reducing maintenance costs.

It can be understood that the electric riding machine may be other typesof electric machines, as long as the electric machines can output powerin other forms in addition to walking power to fulfil other functionsbesides walking, the electric machines can be considered as ridingelectric machines, such as riding snow throwers, riding agriculturalmachines, riding mops, riding sweepers and the like. In fact, as long asthese tools include the substance described below in this disclosure,they all fall within the scope of this disclosure.

In order to facilitate the description of the technical solution of thepresent disclosure, the front side, the rear side, the upper side, thelower side, the left side, and the right side are defined as shown inFIG. 1 .

As shown in FIGS. 1-12 , the electric riding lawn mower 100 includes amain frame 11, a seat 12, a power output assembly 13, a walking assembly14, an operating assembly 15, and a power supply device 16.

The main frame 11 is used to carry various modules of the electricriding lawn mower 100. Specifically, the main frame is used to supportthe seat 12, the power output assembly 13, the walking assembly 14, theoperating assembly 15, and the power supply device 16, and the like. Themain frame 11 extends generally in the front-rear direction.Specifically, the main frame 11 extends at least partially in adirection parallel to a first straight line 101 in the front-reardirection. The main frame 11 includes a frame 11 a and a base 11 b. Theframe 11 a includes a first arm 111, a second arm 112, and a connectingarm 113 that connects the first arm 111 and the second arm 112. Theconnecting arm 113 connects the first arm 111 and the second arm 112such that the first arm 111, the second arm 112, and the connecting arm113 constitute a frame 11 a that supports the base 11 b. The first arm111 and the second arm 112 may be in the front-rear direction. In thepresent example, the connecting arm 113 extends in the left-rightdirection; the number of the connecting arms 113 is two. One of theconnecting arms 113 connects the first arm 111 and the second arm 112 atthe front ends thereof, and the other connecting arm 113 connects thefirst arm 111 and the second arm 112 at the rear ends thereof, such thatthe first arm 111, the second arm 112 and the two connecting arms 113form a substantially rectangular frame 11 a. It is to be understood thatthe structure of the first arm 111, the second arm 112 and the twoconnecting arms 113 is not limited thereto, and the structure of theframe 11 a is not limited thereto. The frame 11 a surrounds the base 11b, and the shape of the base 11 b is adapted to the shape of the frame11 a. In the front-rear direction, the base 11 b is provided at thefront of the frame 11 a, the base 11 b fills the front portion of therectangular formed by the surrounding frame 11 a, and the base 11 b isat least partially extended in a plane extending in the front-reardirection, and the base 11 b serves as a work platform to support theuser's feet and some mechanisms that can be operated with the user'sfeet. The seat 12 is for a user to ride, and the seat 12 is mounted tothe main frame 11. The seat 12 is slidable with respect to the mainframe 11 in the direction of the first straight line 101, so that theseat 12 can be moved forward or backward, so that the user can adjustthe position of the seat 12 in the front-rear direction according to theuser's height and usage habits, aiding comfort of the electric ridinglawn mower 100. The seat 12 specifically includes a bottom portion 121and a backrest 122. The bottom portion 121 extends substantially in thefront-rear direction, and the backrest portion 122 extends upward fromthe bottom portion 121. As shown in FIGS. 1 and 3 , when the user sitson the seat 12, the user faces the forward direction of the electricriding lawn mower 100, i.e., the user faces the front side. The frame 11a can support the seat 12, it should be understood that the frame 11 amay directly support the seat 12, and the frame 11 a may also indirectlysupport the seat 12 by connecting to other structures. The seat 12 isprovided on the upper side of the frame 11 a. In the front-reardirection, at least half of the seat 12 is disposed on the rear side ofthe base 11 b, so that when the user sits on the seat 12, the user'sfeet can be placed on the base 11 b on the front side of the seat 12. Inthis way, on the one hand, the weight of the whole machine can bereduced, and the cost can be saved; on the other hand, the lower side ofthe seat 12 can free more space to set the other two parts, therebysaving space.

The power output assembly 13 includes an output member for outputtingpower to achieve a mechanical function. For example, in the presentexample, the output member may specifically be a mowing member 131. Thepower outputted by the power output assembly 13 is the power other thanenabling the electric riding lawn mower 100 to walk on the ground, anddifferent output members enable the power output assembly 13 to performdifferent functions, for example, the output member may blow the snow,the output member may sweep the ground, the output member may also plowthe field, etc.

In the present example, the output member is the mowing element 131,which can realize the function of trimming the lawn, cutting the weeds,and the like. Specifically, the power output assembly 13 is alsoconnected to the main frame 11, and in the present example, the poweroutput assembly 13 can be specifically mounted to the lower side of themain frame 11. It should be understood that the main frame 11 may bedirectly connected to the power output assembly 13, and may also beindirectly connected through other connection structures to the poweroutput assembly.

The power output assembly 13 is disposed substantially on the lower sideof the main frame 11, which effectively utilizes the space on the lowerside of the main frame 11, and reduces the size of the entire electricriding lawn mower 100 in the front-rear direction such that the wholestructure is more compact. Furthermore, it also reduces the center ofgravity G1 of the electric riding lawn mower 100, improves the stabilityof the electric riding lawn mower 100, and avoids the problem of machinerollover and backward turning during climbing.

The power output assembly 13 further includes: a first motor 132 and achassis 133. The mowing element 131 is used to implement the mowingfunction; the first motor 132 is used to drive the mowing element 131 torotate at a high speed; the chassis 133 is formed with an accommodationspace to accommodate at least a portion of the first motor 132 and atleast a portion of the mowing element 131. The power output assembly 13may include one or more mowing element 131, and respectively, the numberof the first motors 132 can correspond to the mowing element 131. Forexample, in the present example, the number of mowing elements 131 istwo, which increases the cutting range of the electric riding lawn mower100, thereby improving the cutting efficiency.

The walking assembly 14 is used to enable the electric riding lawn mower100 to walk on the lawn and on the ground. In the up-down direction, thewalking assembly 14 is also capable of supporting the main frame 11 andthe various components on the main frame 11. The walking assembly 14 mayspecifically include a first travelling wheel 141 and a secondtravelling wheel 142. The first travelling wheel 141 is disposed on thefront side of the second travelling wheel 142 in the front-reardirection. Therefore, the first travelling wheel 141 may also be definedas the front travelling wheel, and the second travelling wheel 142 mayalso be defined as the rear travelling wheel. In the present example,the number of the first travelling wheels 141 is 2, and the number ofthe second travelling wheels 142 is also 2, which can improve thestability of the electric riding lawn mower 100 in the left-rightdirection and avoid rollovers on the ground or up the hill. In fact, thewalking assembly 14 may also include only one first travelling wheel 141and two second travelling wheels 142; alternatively, the walkingassembly 14 may include two first travelling wheels 141 and one secondtravelling wheel 142; wherein in the direction along the first straightline 101, the power output assembly 13 is at least partially disposedbetween the first travelling wheel 141 and the second travelling wheel142.

Further, the power output assembly 13 is disposed substantially betweenthe first travelling wheel 141 and the second travelling wheel 142; inthe direction along the first straight line 101, the seat 12 is also atleast partially disposed between the first travelling wheel 141 and thesecond travelling wheel 142, so that the center of gravity G1 of theelectric riding lawn mower 100 is located between the first travellingwheel 141 and the second travelling wheel 142 in the direction of thefirst straight line 101, thereby improving the balance performance ofthe whole machine. Further, in the direction along the first straightline 101, the seat 12 is closer to the second travelling wheel 142 andfurther from the first travelling wheel 141, so that the electric ridinglawn mower 100 can be effectively prevented from rollover duringclimbing. In the left-right direction, the two first travelling wheels141 are respectively located at two sides of the main frame 11, and thetwo second travelling wheels 142 are also respectively located at twosides of the main frame 11; that is, the projections of the two firstwalking wheels 141 in a plane perpendicular to the up-down direction areoutside the projection of the main frame 11 in the plane, and theprojections of the two second walking wheels 142 in the plane are alsolocated outside the projection of the main frame 11 in the plane. Inthis way, the main load-bearing portion of the electric riding lawnmower 100 can be placed between the two first travelling wheels 141 andalso between the two second travelling wheels 142, so that the electricriding lawn mower 100 can be further effectively prevented from rollingover.

The first travelling wheel 141 may specifically be a universal wheelthat can rotate about the first axis 102. The first travelling wheel 141has a first diameter. It can be understood that since the firsttravelling wheel 141 is a universal wheel, the electric riding lawnmower 100 can turn, and when the electric riding lawn mower 100 turns,the first axis 102 of first travelling wheel 141 also rotates, and theorientation of the first travelling wheel 141 rotates. The walkingassembly 14 also includes a second motor 143 for driving the secondtravelling wheel 142 to rotate about the second axis 103. The drive fromthe second motor 143 allows the walking assembly to drive the entireelectric riding lawn mower 100 to walk on the ground. In this example,the second motor 143 is independent of the first motor 132 that drivesthe mowing element 131, so that the structure of the whole machine issimpler and the driving is more convenient. The number of the secondmotors 143 is also two, and the two second motors 143 are capable ofdriving the two second travelling wheels 142 respectively. Thus, whenthe two second motors 143 drive the respective second travelling wheels142 at different rotational speeds, a speed difference is generatedbetween the two second travelling wheels 142, thereby causing theelectric riding lawn mower 100 to turn. The second travelling wheel 142has a second diameter, and the second diameter of the second travellingwheel 142 is greater than the first diameter of the first travellingwheel 141. Wherein, the second diameter of the second travelling wheel142, the ratio of the second diameter of the second travelling wheel 142to the first diameter of the first travelling wheel 141 is greater thanor equal to 1.4 and less than or equal to 2, such that the seconddiameter of the second travelling wheel 142 is larger than the firstdiameter of the first travelling wheel 141, so that the electric ridinglawn mower 100 is less likely to roll backward when climbing uphill. Ofcourse, the second diameter of the second travelling wheel 142 cannot beexcessively larger than the first diameter of the first travelling wheel141 to avoid the risk of the electric riding lawn mower 100 rollingforward on the downhill slope.

In the present example, the distance between the second travelling wheel142 and the center of the two second travelling wheels 142 is defined asc1, i.e., half of the distance between the two second travelling wheels142 is considered to be c1. In the present example, with a large numberof modelling, test analyses, theoretical analysis, and creative work onthe electric riding lawn mower 100, it is concluded that in order toavoid rollover when the electric riding lawn mower 100 climbs theuphill, the ratio of the distance c1 between the second travelling wheel142 and the center of the two second travelling wheels 142 to the seconddiameter of the second travelling wheel 142 is greater than or equal to0.5 and less than or equal to 1, such that the distance c1 between thesecond travelling wheel 142 and the center of the two second travellingwheels 142 is not excessively large, and the turning radius of theentire electric riding lawn mower 100 can be reduced, thereby making theelectric riding lawn mower 100 turns faster.

Further, the distance between the center of gravity G1 of the electricriding lawn mower 100 and the two second travelling wheels 142 in theup-down direction is defined as h1, The ratio of the distance h1 to thesecond diameter of the second travelling wheel 142 is greater than orequal to 0.5 and less than or equal to 0.5 and less than or equal to 1,such that when the second diameter of the second travelling wheel 142 isfixed, the center of gravity G1 of the electric riding lawn mower 100can be placed in a reasonable position in the up-down direction.Therefore, the risk of rollover of the electric riding lawn mower 100during climbing is reduced. The position of the center of gravity G1 ofthe electric riding lawn mower 100 can be reasonably improved as thesecond diameter of the second travelling wheel 142 is increased. In thepresent example, the ratio of the distance h1 between the center ofgravity G1 of the electric riding lawn mower 100 and the center of thetwo second travelling wheels 142 in the up-down direction to thedistance c1 between the second travelling wheel 142 and the center ofthe two second travelling wheels 142 is greater than or equal to k1 andless than or equal to k2, that is, k1≤h1/c1≥k2, and the setting of k1and k2 is related to the dimension of the second diameter of the secondtravelling wheel 142. Thus, when the second diameter of the secondtravelling wheel 142 is set, k1 and k2 can also be set to a reasonablevalue. Thus, when the distance c1 between the second travelling wheel142 and the center of the two second travelling wheels 142 is set small,the rollover issue during climbing can be alleviated by lowering thecenter of gravity G1 of the electric riding lawn mower 100.

When the center of gravity G1 of the electric riding lawn mower 100 isset high, the distance c1 between the second travelling wheel 142 andthe center of the two second travelling wheels 142 can be increased toprevent the electric riding lawn mower 100 from rollover duringclimbing. For example, in the present example, k1 has a value of 0.6 andk2 has a value of 1.1, such that 0.6≤h1/c1≥1.1. More specifically, in adirection perpendicular to the first straight line 101 and perpendicularto the second axis 103, the distance L1 between the center of gravity G1of the electric riding lawn mower 100 and the second axis 103 is greaterthan or equal to 0 and less than or equal to 150 mm, that is, thedistance L1 is greater than or equal to 0 and less than or equal to 150mm in the up-down direction, so that the center of gravity G1 of theelectric riding lawn mower 100 is not too high in the up-down direction.When the user sits on the seat 12, the center of gravity will rise tosome extent, but since the center of gravity G1 of the electric ridinglawn mower 100 is set low, the center of gravity G2 of the entiretyformed by the user and the electric riding lawn mower 100 is not toohigh in the up-down direction, which improves stability. It should benoted that, in the present disclosure, the distance between two points,lines and planes in a certain direction refers to the projectiondistance of the spatial distance between them in the specifieddirection.

The operating assembly 15 is for user operation to control the electricriding lawn mower 100 to walk and output power. The operating assembly15 can include a first operating element and a second operating element152. The first operating element is for user to operate to activate thefirst motor 132 in the power output assembly 13 to control the mowingelement 131 to mow. The second operating element 152 is for user tooperate to activate the second motor 143 in the walking assembly 14 tocontrol the electric riding lawn mower 100 to walk on the lawn or on theground. The number of second operating elements 152 is two. In thepresent example, two of the second operating elements 152 are used torespectively control two of the second motors 143. The two secondoperating members 152 are respectively disposed on both sides of theseat 12 such that the two second operating members 152 on both sides canbe more conveniently operated when the user sits on the seat 12.

The power supply device 16 is for supplying power to the first motor 132and the second motor 143. The power supply device 16 includes aplurality of first battery packs 161. Compared with the conventionalriding lawn mowers powered by gasoline, the electric riding lawn mower100 powered by the first battery pack 161 is more environmental friendlyand the later usage cost is also lower. In the long run, the cost of theelectric riding lawn mower using the first battery pack 161 will belower. Compared with riding lawn mowers powered by alternating current,the first battery pack 161 supplies power without using a long powercord, which is safer and more convenient for mowing. In the presentdisclosure, the first battery pack 161 is a lithium battery pack, andthe first battery pack 161 is lighter in weight, higher in charge anddischarge efficiency, and longer in service life than other types ofbattery packs (for example, lead-acid batteries). Further, in thepresent example, the voltage of the first battery pack 161 is 56V. Ofcourse, it can be understood that the voltage value of the first batterypack 161 is not limited thereto.

The power supply device 16 is disposed on the rear side of the seat 12,and in the height direction, the upper end of the power supply device 16is shorter than the seat 12, or the upper end of the power supply device16 is substantially of the same height to the seat 12; further, in theheight direction, the upper end of the first battery pack 161 is shorterthan the seat 12, or the first battery pack 161 is substantially of thesame height to the seat 12.

In the present example, the first battery pack 161 can be detached fromthe main frame 11 by the user, that is, the first battery pack 161 forpowering the electric riding lawn mower 100 is detachably mounted to themain frame 11, so that when the power of the first battery pack 161 isinsufficient, the user can detach the first battery pack 161 forcharging, instead of directly charging the electric riding lawn mower100, thereby improving operational convenience; in addition, when thefirst battery pack 161 is damaged, the user can conveniently disassemblethe first battery pack 161 for maintenance or directly replace the firstbattery pack 161, which avoids fixing or replacing the riding lawn mowerwhose battery pack cannot be disassembled, and thus reduces the cost ofmaintenance at a later stage. Moreover, the ability to disassemble thefirst battery pack 161 also allows for differentiated design of productsfor different platforms or regions, making quality control andmanufacture of the entire electric riding lawn mower 100 easier. Stillalternatively, the power tool system 1 shown in FIG. 8 includes theelectric riding lawn mower 100 and a power tool 100 a in the presentdisclosure. Wherein, the first battery pack 161 in the power supplydevice 16 for supplying power to the electric riding lawn mower 100 canbe detached and mounted into the electric power tool 100 a, so that thefirst battery pack 161 can also power the electric power tool 100 a,that is, the first battery pack 161 in the power supply device 16 in thepresent disclosure can be applied not only to the electric riding lawnmower 100 but also to other electric power tools 100 a, therebyimproving the adaptability of the first battery pack 161 and the abilityof the electric riding lawn mower 100 to adapt to the first battery pack161. Thus, when the electric riding lawn mower 100 is not in use, theuser can disassemble the first battery pack 161 for use in otherelectric power tools 100 a, thereby avoiding waste of resources andreducing usage cost. In other words, when the user needs to use theelectric riding lawn mower 100, the user can borrow the battery pack inother power tool 100 a as the first battery pack 161. In the presentexample, the first battery pack 161 is configured to be pluggablymounted by the user to the electric riding lawn mower 100, and the firstbattery pack 161 is attached and detached by plugging and unplugging,making the operation more convenient, and the positioning of the firstbattery pack 161 more accurate.

Further, as shown in FIG. 9 , the first battery pack 161 includes aplurality of battery cells 161 a connected in series, in parallel, or ina combination of series and parallel. The plurality of battery cells 161a are combined in one battery case to constitute a whole, and thebattery cells 161 a may specifically be lithium-based. Specifically, thepower tool 100 a may be a garden tool such as a string trimmer, a hedgetrimmer, a blower or a chain saw, a torque output tool such as anelectric drill or an electric hammer, a sawing tool such as an electriccircular saw, a curve saw or a reciprocating saw, or a grinding toolsuch as an angle grinder or a sander. Of course, in other examples, thefirst battery pack 161 can also be configured to power a hand-push powertool, such as a hand-push lawn mower, a hand-push snow blower, and thelike. Thus, the first battery pack 161 of the present disclosure adaptedto the electric riding lawn mower 100 can be pulled out by the user tobe applied to the above power tool 100 a, in other words, the user canborrow the battery packs in the power tool 100 a as the first batterypack 161 to power the electric riding lawn mower 100, thereby improvingthe versatility of the electric riding lawn mower 100 and reducing theusage cost.

In the present example, the area surrounded by the frame 11 a may bedivided into a front portion, a middle portion, and a rear portion inthe front-rear direction. The base 11 b only fills the front portion ofthe frame 11 a, and the middle portion and the rear portion of the frame11 a are not provided with the base 11 b, and the seat 12 is provided onthe upper side of the middle portion of the frame 11 a, so that thelower side of the seat 12 and the middle portion of the frame 11 a havemore space to for other components, so that the structure of the wholemachine is more compact. The rear portion of the frame 11 a and the rearside of the seat have a sufficiently large accommodation space which canbe used to house the power supply device 16. In the present example, thenumber of the first battery packs 161 included in the power supplydevice 16 is plural; the number of the first battery packs 161 is atleast 4; the number of the first battery packs 161 is greater than orequal to 4 and less than or equal to 10. Further, in the presentexample, the number of the first battery packs 161 is exemplified bysix, so that the electric riding lawn mower 100 is powered by theplurality of first battery packs 161, and on the other hand, theendurance capability of the entire electric riding lawn mower 100 isimproved, thereby avoiding the trouble of repeated charging, andimproving the efficiency of work; on the other hand, the power supplydevice 16 includes a plurality of first battery packs 161, and thus theweight of the power supply device 16 is heavier. For the entire electricriding lawn mower 100, the weight of the power supply device 16 makes upa large proportion of the weight of the entire electric riding lawnmower 100. Therefore, disposing the power supply device 16 in the rearend of the frame 11 a and on the rear side of the seat 12 locates thepower supply device 16 at the rear end of the electric riding lawn mower100, thereby enabling the center of gravity G1 of the electric ridinglawn mower 100 to move backward, further reducing the possibility ofrolling over backwards when the electric riding lawn mower 100 climbsthe slope, and improving the safety performance.

Further, the center of gravity G1 of the electric riding lawn mower 100is disposed on the lower side of the seat 12. For the entire electricriding lawn mower 100, the seat 12 is substantially in the middleposition in the front-rear direction, and the center of gravity G1 ofthe electric riding lawn mower 100 is disposed on the lower side of theseat 12; thus, the user sitting on the seat 12 only causes the center ofgravity G2 of both the user and the electric riding lawn mower 100 tochange only in the up-down direction with respect to the center ofgravity G1 of the electric riding lawn mower 100 when the user is notsitting on the seat 12. The position of the center of gravity G2 doesnot change in the front-rear direction and the left-right direction, sothat the risk of rollover caused by the user sitting on the seat 12 canbe further reduced. The center of gravity G1 of the electric riding lawnmower 100 is disposed on the lower side of the seat 12. Therefore,regardless of whether a user with a relatively heavy weight or a userwith a relatively light weight operates the electric riding lawn mower100, the center of gravity G2 of the entirety constructed by the userand the electric riding lawn mower 100 will not change in the left-rightdirection and the front-rear direction, thereby improving the stabilityof the electric riding lawn mower 100.

As described above, when the center of gravity G1 of the electric ridinglawn mower 100 is lowered in the up-down direction, and if the user sitson the seat 12, the center of gravity G2 of the entirety constructed bythe user and the electric riding lawn mower 100 will also declinerelatively. Thus, when the user rides the electric riding lawn mower 100of the present disclosure to climb a slope, the second travelling wheel142 has a contact point P with the slope surface, and the projectiondistance between the center of gravity G2 of the entirety constructed bythe user and the electric riding lawn mower 100 and the contact point Pin the horizontal direction is B. In the direction perpendicular to thefirst line 101 and perpendicular to the second axis 103, the distancebetween the center of gravity G2 of the entirety constructed by the userand the electric riding lawn mower 100 and the slope surface is h, thatis, in the direction perpendicular to the slope surface, the distancebetween the center of gravity G2 of the entirety constructed by the userand the electric riding lawn mower 100 and the slope surface is h.Wherein, the following relationship is satisfied between the projectiondistance B and the distance h:B=A*cos α−h*sin α,

Wherein, A is the distance between center of gravity G2 of the entiretyconstructed by the user and the electric riding lawn mower 100 and thesecond axis 103 of the second travelling wheel 142; the angle α is theangle between the slope surface and the horizontal plane.

From the above relationship between the projection distance B and thedistance h, the distance A between center of gravity G2 of the entiretyconstructed by the user and the electric riding lawn mower 100 and thesecond axis 103 of the second travelling wheel 142 is fixed; and whenthe angle α formed between the slope surface and the horizontal plane isalso fixed, the smaller the distance h between the center of gravity G2of the entirety constructed by the user and the electric riding lawnmower 100 and the slope surface in a direction perpendicular to thefirst straight line 101 and perpendicular to the second axis 103, thelarger the projection distance B between the center of gravity G2 of theentirety constructed by the user and the electric riding lawn mower 100and the contact point P in the horizontal direction, which makes theelectric riding lawn mower 100 easier to climb and less likely to rollover.

The chassis 133 and the main frame 11 also need to be separated by acertain distance to allow the chassis 133 to waggle up and down.Specifically, the distance between the chassis 133 and the main frame 11should be greater than or equal to 20 mm and less than or equal to 60mm. In another example, it is also necessary to make the distancebetween the mowing element 131 and the ground satisfy the requirement ofmowing. Specifically, the distance between the mowing element 131 andthe ground should be greater than or equal to 20 mm and less than orequal to 120 mm. In another example, in the present example, the powerof the first motor 132 is greater than or equal to 500 W and less thanor equal to 1500 W, and therefore, the size of the space inside thechassis 133 also needs to meet the size of the first motor 133.

In the direction along the first straight line 101, the distance L2between the center of gravity G1 of the electric riding lawn mower 100and the second axis 103 is greater than or equal to 0 and less than orequal to 400 mm, such that the electric riding lawn mower 100 is notlikely to roll over during climbing. In the direction along the firststraight line 101, The ratio of the distance L3 between the center ofgravity G1 of the electric riding lawn mower 100 and the first axis 102to the distance L2 between the center of gravity G1 of the electricriding lawn mower 100 and the second axis 103 is greater than or equalto 2 and less than or equal to 4, so that the center of gravity G of theelectric riding lawn mower 100 is set at a proper position in adirection along the first straight line 101. Therefore, not only can theclimbing ability be taken into account, but also the problem of rolloverwhen climbing uphill can be taken into account, and the problem of theoverturning when going downhill with the electric riding lawn mower 100can also be avoided.

The power supply device 16 includes a battery compartment housing 16 athat includes a main body portion 16 b and a cover 16 c that ispivotally coupled to the main body portion 16 b. The main body portion16 b may include a first battery compartment 162 for mounting the firstbattery pack 161, and the power supply device 16 may include two or morefirst battery compartments 162, and the number of the first batterycompartments 162 may also be a specific plural. Specifically, in thisexample, the power supply device 16 includes six first batterycompartments 162, and the six first battery compartments 162 aredisposed on the rear side of the seat 12 away from the first travellingwheel 141, that is, in the direction of the first straight line 101, thefirst battery compartment 162 and the first travelling wheel 141 arerespectively disposed on both sides of the seat 12. In this way, theweight of the electric riding lawn mower 100 can be shifted back,thereby increasing the positive pressure of the second travelling wheel142 at the rear end to the ground, thereby increasing grip of the secondtravelling wheel 142 of the electric riding lawn mower 100, and makingclimbing uphill easier.

Correspondingly, the power supply device 16 includes six first batterypacks 161, and each of the first battery packs 161 can be respectivelymounted to each of the first battery compartments 162. The first batterycompartment 162 may be formed with a first groove 162 a. The firstbattery pack 161 can be detachably inserted into the first groove 162 aalong the direction of the second straight line 104. The first batterypack 161 can also be pulled out of the first groove 162 a along thedirection of the second straight line 104. The cover 16 c has an openstate and a closed state, and when the cover 16 c is in the open state,the first groove 162 a is opened and the user can insert the firstbattery pack 161 into the first groove 162 a; when the cover 16 c is inthe closed state, the first groove 162 a is closed to provide a certainprotection to the first battery pack 161 located in the batterycompartment housing 16 a. It can be understood that the first batterycompartment 162 can also be provided with a guiding structure 162 b forguiding the first battery pack 161 to be inserted into the first groove162 a in the direction of the second straight line 104, such that thefirst battery pack 161 can be positioned more accurately in the firstgroove 162 a. The first battery compartment 162 may also be providedwith a latch 162 c for locking the first battery pack 161 in the firstgroove 162 a. The latch 162 c can lock the first battery pack 161, andallow the first battery pack 161 to be pulled out. In this way, thewaggle of the first battery pack 161 can be avoided. The first batterycompartment 162 may also be provided with a pop-up structure 162 d forejecting the first battery pack 161, thereby enabling the user to pullout the first battery pack effortlessly. The first battery compartment162 is further provided with an input terminal 162 e to electricallyconnect to the first battery pack 161, and the input terminal 162 e isfor introducing the electric energy output by the first battery pack 161to the electric riding lawn mower 100.

The direction of the second straight line 104 in which the first batterypack 161 is inserted into the first groove 162 a obliquely intersectswith the direction of the first straight line 101. Further, between thedirection of the second straight line 104 and the direction of the firststraight line 101, an angle greater than 60 degrees and less than 90degrees may be formed, enabling the user to easily insert and remove thefirst battery pack 161 without squatting. That is, the angle formedbetween the direction of the second straight line 104 in which the firstbattery pack 161 is inserted into the first groove 162 a and thestraight line extending in the up-down direction is greater than 0degrees and less than or equal to 30 degrees, so that the user caneasily insert and remove the first battery pack 161 without bendinglargely, thereby making the operation more effortless, and avoiding theuser twisting or bending the arm when pulling out the first battery pack161, thereby facilitating the human-machine experience. It can beunderstood that the six first battery compartments 162 can also beformed by a single larger battery compartment, that is, the power supplydevice 16 may include only one battery compartment, and the plurality offirst battery packs 161 are all installed in this battery compartment.

Alternatively, the power supply device 16 may include only one firstbattery compartment 162; correspondingly, the power supply device 16 mayinclude only one first battery pack 161. That is to say, the number ofthe first battery compartments 162 and the number of the first batterypacks 161 are not specifically limited, and the correspondencerelationship between the first battery compartment 162 and the firstbattery pack 161 is not limited to the one-to-one correspondencerelationship. It can be understood that, in other examples, thedirection of the second straight line 104 in which the first batterypack 161 is inserted into the first groove 162 a may also beperpendicular to the direction of the first straight line 101, and thedirection of the second straight line 104 in which the first batterypack 161 is inserted into the first groove 162 a may also be parallel tothe direction of the first straight line 101.

In the example, the power supply device 16 includes six first batterypacks 161, and the six first battery packs 161 are disposed on the rearside of the seat 12. The six first battery packs 161 are arranged in aregular shape on the rear side of the seat 12. The first batterycompartment 162 disposed on the rear side of the seat 12 is furtherdisposed on the rear side of the second travelling wheel 142. The firstbattery pack 161 has a height direction extending in the direction inwhich it is inserted into the first groove 162 a, and has a longitudinaldirection and a width direction perpendicular to the height direction;the dimension of the first battery pack 161 in the longitudinaldirection is greater than the dimension thereof in the width direction.In this example, when the first battery pack 161 is inserted into thefirst groove 162 a, the longitudinal direction of the first battery pack161 and the second axis 103 of the second travelling wheel 142 areparallel to each other, that is, the longitudinal direction of the firstbattery pack 161 extends in the left-right direction. Thus, when theuser needs to install or remove the first battery pack 161, the userdoes not need to twist the wrist, which improves the comfort ofoperation.

More specifically, the six first battery packs 161 are arranged in threerows in the front-rear direction, and each row has two first batterypacks 161 arranged in the left-right direction. The two first batterypacks 161 disposed in the left-right direction are defined as onebattery unit group, or form a modular power supply device, and thelength of the first battery pack 161 in the left-right direction isgreater than the width thereof in the front-rear direction. Thus, twofirst battery packs 161 are arranged on a straight line parallel to theleft-right direction, and three first battery packs 161 are arranged ona straight line parallel to the front-rear direction, and theorientation of each first battery pack 161 is arranged such that itslength in the left-right direction is also greater than its length inthe front-rear direction. Thus, the dimension of the six first batterypacks 161 is not excessively long in the front-rear direction so as notto increase the size of the entire electric riding lawn mower 100 in thefront-rear direction; and also the dimension of the six first batterypacks 161 is not too small in the left-right direction to effectivelyutilize the space occupied by the electric riding lawn mower 100 in theleft-right direction. Thereby, the arrangement of the power supplydevice 16 is more reasonable, the space is saved, and the modularizationis facilitated. Of course, it can be understood that when two firstbattery packs 161 in the power supply device 16 are used as one batteryunit group, the power supply device 16 may also include two battery unitgroups, and may further include three or more battery unit groups,thereby facilitating modularization of the power supply device 16 andimplementation of a variety of configurations.

In the present example, the capacity of a first battery pack 161 isgreater than or equal to 130 Wh and less than or equal to 1000 Wh.Further, the capacity of a first battery pack 161 is greater than orequal to 130 Wh and less than or equal to 500 Wh, so that the dischargetime of the first battery pack 161 can also meet the most basicrequirements even when only one first battery pack 161 is included inthe power supply device 16; or, when the plurality of first batterypacks 161 included in the power supply device 16 are out of power andthe electric riding lawn mower 100 needs to perform mowing, one firstbattery pack 161 or two first battery packs 161 may be charged first,and after the charging is completed, the one first battery pack or thetwo first battery packs 161 are inserted to the first batterycompartment 162 to supply power. Therefore, because the capacity of thefirst battery pack 161 is greater than or equal to 130 Wh, the dischargetime of the first battery pack 161 can meet the urgent needs of the userto cut a part of the grass, in other words, does not delay the use. Itcan be understood that, in the present disclosure, when any of the firstbattery packs 161 is installed in the battery compartment housing 16 a,the electric riding lawn mower 100 can be operated, that is, in thepresent disclosure, the electric riding lawn mower 100 is not limited tooperate only if all of the first battery compartments 162 are installedwith the first battery packs 161 capable of supplying power.Alternatively, when the plurality of first battery packs 161 are mountedto the battery compartment housing 16 a, and some of the first batterypacks 161 are depleted, the electric riding lawn mower 100 can stilloperate, thereby improving work efficiency. Further, in the presentexample, the weight of one first battery pack 161 is greater than orequal to 0.1 kg and less than or equal to 4 kg, which eases carryingdifficulties due to the excessive weight of the first battery pack 161.Further, for considerations to allow the electric riding lawn mower 100of the present disclosure to borrow battery packs in other electricpower tools, it is also necessary to make the weight of the firstbattery pack 161 equal to or greater than 0.1 kg and equal to or lessthan 4 kg. More preferably, the weight of the first battery pack 161 isgreater than or equal to 1 kg and less than or equal to 4 kg, so thatthe first battery pack 161 can satisfy the capacity and discharge timedemands when the weight of the first battery pack 161 is not excessivelyheavy.

On the other hand, the ratio of the discharge power of a single firstbattery pack 161 to the nominal voltage of the first battery pack 161 isgreater than or equal to 10 W/V and less than or equal to 25 W/V, andfurther, the ratio of the discharge power of a single first battery pack161 to the nominal voltage of the first battery pack 161 is greater thanor equal to 12 W/V and less than or equal to 20 W/V. Specifically, thedischarge power of the first battery pack 161 is greater than or equalto 500 W and less than or equal to 6500 W. Further, the discharge powerof the first battery pack 161 is greater than or equal to 500 W and lessthan or equal to 3000 W, which enables the first battery pack 161 toadapt to the high power needs of the electric riding lawn mower 100 ofthe present disclosure. In this example, the power supply device 16includes a plurality of first battery packs 161, and the plurality offirst battery packs 161 provide an overall discharge power of greaterthan or equal to 2000 W and less than or equal to 4000 W, which enablesthe electric riding lawn mower 100 to output high power, and last a longtime, saving the trouble of repeated charging.

In a horizontal direction along the first straight line 101 or along arotation axis perpendicular to the second axis 103, the distance L4between the center C of the battery compartment housing 16 a provided onthe rear side of the seat 12 and the second axis 103 of the secondwalking wheel 142 is less than or equal to 500 mm. Alternatively, thehorizontal distance between the center of gravity of the electric ridinglawn mower 100 with the first battery pack 161 mounted and the center ofthe rotating shaft of the second travelling wheel 142 is less than orequal to 500 mm. Alternatively, the horizontal distance between thecenter of some of the first battery compartments 162 and the center ofthe rotating shaft of the second walking wheel 142 is less than or equalto 500 mm. Alternatively, the horizontal distance between the center ofall of the first battery compartments 162 disposed on the rear side ofthe seat 12 and the rotating shaft of the second travelling wheel 142 isless than or equal to 500 mm. Further, In a horizontal direction alongthe first straight line 101 or along a rotation axis perpendicular tothe second axis 103, the distance L4 between the center C of the batterycompartment housing 16 a provided on the rear side of the seat 12 andthe second axis 103 of the second walking wheel 142 is less than orequal to 300 mm. Alternatively, the horizontal distance between thecenter of gravity of the electric riding lawn mower 100 with the firstbattery pack 161 mounted and the center of the rotating shaft of thesecond travelling wheel 142 is less than or equal to 300 mm.Alternatively, the horizontal distance between the center of some of thefirst battery compartments 162 and the center of the rotating shaft ofthe second walking wheel 142 is less than or equal to 300 mm.Alternatively, the horizontal distance between the center of all of thefirst battery compartments 162 disposed on the rear side of the seat 12and the rotating shaft of the second travelling wheel 142 is less thanor equal to 300 mm. This increases the positive pressure of the secondtravelling wheel 142 against the ground and the grip of the secondtravelling wheel 142, and reduces the torque required for the electricriding lawn mower 100 in zero-turns to make zero-turns more flexible.The horizontal distance between one point and another point or linerecited in the present disclosure refers to the projection distancebetween the two on the horizontal plane when the electric riding lawnmower 100 is placed on a horizontal ground. Similarly, the verticaldistance between one point and another point or line recited in thepresent disclosure refers to the projection distance between the two onthe vertical plane when the electric riding lawn mower 100 is placed ona horizontal ground.

That is to say, the distance L4 between the center C of entiretyconstructed by some or all of the first battery compartment 162 providedon the rear side of the seat 12 and the second axis 103 of the secondtravelling wheel 142 is less than or equal to 300 mm. When all of thefirst battery compartments 162 in the power supply device 16 areprovided with the first battery packs 161, the distance between thecenter of gravity G3 of the power supply device 16 on the rear side ofthe seat 12 and the second axis 103 of the second travelling wheel 142is less than or equal to 300 mm. Therefore, this increases positivepressure of the second travelling wheel 142 on the ground and thefriction between the second travelling wheel 142 and the slope surfacewhen the electric riding lawn mower 100 climbs uphill, thereby improvingthe climbing ability of the riding electric lawn mower 100, and avoidingslippage during walking on the ground or climbing up the hill; inaddition, this reduces the torque required for the electric riding lawnmower 100 in zero-turns, allowing more flexible turns to be performed bythe electric riding lawn mower 100.

In a direction perpendicular to the first straight line 101 andperpendicular to the second axis 103, the distance between the center Cof the battery compartment housing 16 a disposed on the rear side of theseat 12 and the second axis 103 of the second travelling wheel 142 isless than or equal to 300 mm, that is, in the up-down direction, thedistance between the center C of the battery compartment housing 16 adisposed on the rear side of the seat 12 and the second axis 103 of thesecond travelling wheel 142 is less than or equal to 300 mm. It can beunderstood that, in a direction perpendicular to the first straight line101 and perpendicular to the second axis 103, the distance between thecenter C of entirety constructed by some or all of the first batterycompartment 162 provided on the rear side of the seat 12 and the secondaxis 103 of the second travelling wheel 142 is less than or equal to 300mm, that is, in the up-down direction, the distance between the center Cof entirety constructed by some or all of the first battery compartment162 provided on the rear side of the seat 12 and the second axis 103 ofthe second travelling wheel 142 is less than or equal to 300 mm. Inother words, the vertical distance between the center of at least someof the first battery compartments 162 and the center of the rotatingshaft of the second travelling wheel 142 is less than or equal to 300mm. Or the distance between the center of gravity of the electric ridinglawn mower 100 with the first battery pack 161 mounted and the center ofthe rotation axis of the second travelling wheel 142 is less than orequal to 300 mm. In other words, the vertical distance between thecenter C of all the first battery compartments 162 disposed on the rearside of the seat 12 and the rotating shaft of the second travellingwheel 142 is less than or equal to 300 mm. This helps lowering thecenter of gravity G1 of the entire electric riding lawn mower 100,thereby reduces the possibility of rollover to the back when theelectric riding lawn mower 100 climbs uphill, the possibility ofrollover to the front when the electric riding lawn mower 100 goesdownhill, and the possibility of rollover to the side when the electricriding lawn mower 100 walks on uneven ground.

Further, the distance between the center of at least some of the firstbattery compartment 162 and the center of the rotation axis of thesecond walking wheel 142 in the left-right direction is less than 100mm; in other words, the distance between the center of gravity of theelectric riding lawn mower 100 installed with the first battery pack 161and the center of the rotation axis of the second walking wheel 142 inthe transverse direction of the riding type electric lawn mower 100 isless than 100 mm, so that the center of gravity of the whole machine iscloser to the center axis 105 of the whole machine, so that the machineis less likely to tip over when travelling transversely or laterally onthe slope.

In a direction parallel to the second axis 103, the distance between thecenter C of the battery compartment housing 16 a disposed on the rearside of the seat 12 and the center of the two second travelling wheels142 is less than or equal to 100 mm; that is, in the left-rightdirection, the distance between the center C formed by all the numbersof the first battery compartments 162 disposed on the rear side of theseat 12 and the center of the two second travelling wheels 142 is lessthan or equal to 100 mm. This enables the center of the power supplydevice 16 to be placed as close as possible to the center axis 105,particularly in the case where the shape of the power supply device 16is relatively regular, which causes the center of gravity of the powersupply device 16 to be placed as close as possible to the center axis105, to avoid the problem of rollover in the left-right direction whenthe electric riding lawn mower 100 travels laterally on the slopesurface, thereby improving the stability performance of the electricriding lawn mower 100.

As described above, the number of the second travelling wheels 142 istwo, and the two second travelling wheels 142 are symmetrically disposedon both sides of a plane of symmetry, and in the present example, theentirety constructed by all of the first battery compartments 162 on therear side of the seat 12 is symmetrically disposed about the plane ofsymmetry, thereby improving the balance performance of the wholemachine.

Referring to FIG. 12 or FIG. 13 , in the example of the presentdisclosure, all the battery packs disposed on the rear side of the seat12 are such that the center of at least some battery packs is located onthe right side of the center axis 105 of the electric riding lawn mower100, and the center of the other battery packs is located on the leftside of the center axis 105 of the electric riding lawn mower 100. Here,the center axis 105 of the electric riding lawn mower 100 is parallel tothe front-rear direction or the forward direction of the machine. Insome other examples of the present disclosure, assuming that theelectric riding lawn mower 100 employs at least one large-sized batterypack, a portion of the at least one battery pack disposed on the rearside of the seat 12 is disposed on the right side of the center axis 105of the electric riding lawn mower 100, and the other portion of the atleast one battery pack is disposed on the left side of the center axis105 of the electric riding lawn mower 100. The battery pack is arrangedsuch that the center of gravity of the electric riding lawn mower 100 islocated near the center axis 105 or closer to the center axis 105 of thewhole machine, which is advantageous for balancing the center of gravityof the electric riding lawn mower 100.

As shown in FIG. 13 , all the battery packs of the electric riding lawnmower 100 are provided, besides on the rear side of the seat 12 as shownin FIG. 12 , on the front side of the seat 12. Disposing some batterypacks on the front side of the rotating shaft of the second travellingwheel 142, and the other battery packs on the rear side of the rotatingshaft of the second travelling wheel 142 increases the positive pressureof the second travelling wheel 142 against the ground and the grip ofsecond travelling wheel 142, and reduces the torque required for theelectric riding lawn mower 100 in zero-turns to make zero-turns moreflexible. In this example, the battery packs on the front side of theseat 12 may be fixedly mounted to the electric riding lawn mower 100;and the battery packs on the rear side of the seat may be detachablymounted to the electric riding lawn mower 100. In some other examples ofthe present disclosure, if the battery pack provided in the electricriding lawn mower 100 is a large-sized battery pack, a portion of thelarge-sized battery pack is located on the front side of the rotatingshaft of the second travelling wheel 142, and the other portion of thelarge-sized battery pack is located on the front side of the rotatingshaft of the second travelling wheel 142, so as to increase the positivepressure of the second travelling wheel 142 against the ground and thegrip of second travelling wheel 142, and reduce the torque required forthe whole machine in zero-turns to make zero-turns more flexible.

In order to prevent the first battery pack 161 from being detached fromthe first battery compartment 162, a vibration damping device is furtherdisposed between the power supply device 16 and the main frame 11, sothat the first battery pack 161 can be prevented from being detachedfrom the first battery compartment 162, thereby improving the effectiveelectrical connection between the first battery pack 161 and the firstbattery compartment 162.

When the first battery pack 161 is inserted into the first groove 162 a,the dimension of the cross section of the first battery pack 161 in aplane perpendicular to the direction of the second straight line 104along the direction in the first straight line 101 is smaller than thedimension of the cross section along the direction perpendicular to thefirst straight line 101 and parallel to the plane, that is, when thefirst battery pack 161 is inserted into the first groove 162 a, thefirst battery pack 161 has a thinner dimension in the directionperpendicular the first straight line 101 than in the direction of thefirst straight line 101, thereby facilitating the user to grasp thefirst battery pack 161 to insert the first battery pack 161 into thefirst groove 162 a or pull it out from the first groove in 162 a.

The first battery pack 161 may specifically include a first battery packhousing 161 b and a plurality of battery cells 161 a disposed in thefirst battery pack housing 161 b. The direction in which the batterycells 161 a extends in the first battery pack 161 is parallel to thedirection of the second line 104 in which the first battery pack 161 isinserted into the first groove 162 a.

As shown in FIG. 1 , the electric riding lawn mower 100 may further beprovided with a grass collecting device 17 for collecting grass, and thegrass collecting device 17 may be detachably connected to the main bodyportion of the electric riding lawn mower 100. The grass collectingdevice 17 specifically includes a grass collecting basket 171 and aconnecting pipe 172; the grass collecting basket 171 is foraccommodating the cut grass clippings, and the connecting pipe 172 isconnected to the bottom plate 133 and the grass collecting basket 171 todeliver the grass clippings to the grass collecting basket 171. In thepresent example, the power supply device 16 is disposed on the rear sideof the seat, and the power supply device 16 further includes a batterycompartment housing 16 a. The plurality of first battery packs 161 ofthe power supply device 16 are arranged substantially in a planeperpendicular to the up-down direction. This allows the shape of thebattery compartment housing 16 a to be substantially disposed in theplane such that the upper side of the cover 16 c of the batterycompartment housing 16 a and the rear side of the seat 12 have a largefree space, which allows the grass basket 171 to be placed on the upperside of the battery compartment housing 16 a, thereby saving space, andmaking the structure of the whole machine more reasonable and morecompact. Furthermore, due to its light weight, placing the grass basket171 on the rear end of the electric riding lawn mower 100 does not havea great impact on the center of gravity of the whole machine. Therefore,it can be understood that the center of gravity of the electric ridinglawn mower 100 or the center of gravity of the entirety of the electricriding lawn mower 100 and the user can be understood as either includingthe grass collecting device 17 or not including the grass collectingdevice 17.

The electric riding lawn mower 200 of the second example shown in FIG.13 may have the same main frame 21, seat 22, power output assembly 23,walking assembly 24 and operating assembly 25 as the electric ridinglawn mower in the first example. This example only differs from thefirst example in that the power supply device 26 includes a secondbattery pack 263 besides the first battery compartment 262 and the firstbattery pack 261 as in the first example. The parts of the first examplethat are compatible with this example can be applied to this example,and details are not described herein.

In the present example, the second battery pack 263 can be disposed onthe lower side of the seat 22, so that the center of gravity G of thewhole machine in the direction along the first straight line 201 can beas close as possible to the seat 22 and the first travelling wheel 241in order to effectively avoid the problem of tilting up when theelectric riding lawn mower 200 climbs uphill; and this also increasesthe positive pressure of the first travelling wheel 241 against theground and the grip of the first travelling wheel 241 to prevent theelectric riding lawn mower 200 from slippage when walking on the ground;further, especially when the rear end of the electric riding lawn mower200 is provided with the grass collecting device, the structure of thesecond battery pack 263 being disposed on the lower side of the seat 22can effectively reduce the center of gravity G of the electric ridinglawn mower 200, thereby improving the stability of the whole machine.Further, the second battery pack 263 is also disposed on the front sideof the second travelling wheel 242.

In addition, in the example, the second battery pack 263 may be fixedlymounted to the main frame 21, that is, the second battery pack 263 isnot quickly removable by the user without using auxiliary tools, so thatthe second battery pack 263 can be fixed on the main frame 21 tocontinuously supply power to the electric riding lawn mower 200, therebyavoiding the situation when both the first battery pack 261 and thesecond battery pack 263 in the power supply device 26 are removed by theuser such that the walking assembly 14 does not have power supply andthat the electric riding lawn mower 200 cannot walk. Of course, it canbe understood that the second battery pack 263 can also be configured tobe detachable or pluggable by the user.

The position of the second battery pack 263 is not limited to beingdisposed on the lower side of the seat 22, in fact, as long as it isdistinguished from the position of the first battery pack 261 because ofconsiderations in balance performance or structural adaptation of thewhole machine, it is within the scope of this disclosure.

In the present example, only one second battery pack 263 is provided onthe lower side of the seat 22. Of course, it can be understood that thesecond battery pack 263 on the lower side of the seat 22 may also be twoor more. In the direction perpendicular to the first line 201 and thefirst axis 202, the distance between the center of gravity of theentirety formed by all the battery packs in the power supply device 16and the second axis 203 is less than 300 mm, that is, the distancebetween the center of gravity of the entirety formed by all the firstbattery packs 261 plus all the second battery packs 263 and the secondaxis 203 is less than 300 mm, such that the center of gravity of theentire electric riding lawn mower 200 can be lowered, thereby avoidingthe problem of rollover on the slope.

In addition, in other examples, it is also possible to configure one ormore of the first battery packs 261 disposed on the rear side of theseat 22 to be fixedly mounted to the main frame 21, which also preventsthe electric riding lawn mower 200 from the problem of being unable towalk due to the lack of power source.

In the third example shown in FIG. 14 , the electric riding lawn mower300 may have the same main frame 31, seat 32, power output assembly 33,walking assembly 34 and operating assembly 35 as the electric ridinglawn mower 100 of the first example. This example only differs from thefirst example in that the power supply device 36 includes only a firstbattery pack 361 having a larger capacity, and the first battery pack361 can be detachably coupled to electric riding lawn mower 300 with apluggable approach performed by the user. In the fourth example shown inFIG. 15 , the electric riding lawn mower 400 may have the same mainframe 41, seat 42, power output assembly 43, walking assembly 44 andoperating assembly 45 as the electric riding lawn mower 100 of the firstexample. This example only differs from the first example in that thepower supply device 46 includes a power supply interface 46 a forconnecting a backpack power supply device 410 such that when the usersits in the seat 42, the user can carry the backpack power supply device410 on the back to facilitate the operation of the electric riding lawnmower 400.

The basic principles, main features and advantages of the presentdisclosure have been shown and described above. It should be understoodby those skilled in the art that the above-described examples are notintended to limit the disclosure in any way, and the technical solutionsobtained by means of equivalent replacement or equivalent transformationare all within the scope of the disclosure. It will also be understoodthat the present disclosure provides an electric riding lawn mower withbetter adaptability and less usage cost.

What is claimed is:
 1. An electric riding lawn mower, comprising: a seatfor a user to sit on; a body for supporting the seat; a power outputassembly comprising a mowing element for realizing a mowing function; awalking assembly comprising a first travelling wheel and a secondtravelling wheel; an electric motor assembly configured to drive atleast one of the power output assembly and the walking assembly; and apower supply device comprising a plurality of battery packs to power theelectric motor assembly; wherein at least one of the plurality ofbattery packs is disposed at a rear side of the seat, and a capacity ofeach of the plurality of battery packs is greater than or equal to 130Wh and less than or equal to 1000 Wh, and at least one of the pluralityof battery packs is configured to supply power to the electric motorassembly when mounted to the body, and to supply power to a hand-heldpower tool when removed from the body and electrically coupled to thehand-held power tool.
 2. The electric riding lawn mower of claim 1,wherein the plurality of battery packs are further configured to powerhand-held power tools when the plurality of battery packs are removedfrom the body.
 3. The electric riding lawn mower of claim 1, wherein atleast a portion of the power supply device is disposed at a lower sideof the seat.
 4. The electric riding lawn mower of claim 1, wherein thebody comprises a plurality of connecting arms, and the plurality ofconnecting arms form a substantially rectangular frame.
 5. The electricriding lawn mower of claim 1, wherein, in a height direction, theplurality of battery packs are shorter than the seat.
 6. The electricriding lawn mower of claim 1, wherein a number of the plurality ofbattery packs is greater than or equal to 4 and less than or equal to10.
 7. The electric riding lawn mower of claim 1, wherein a center ofgravity G1 of the electric riding lawn mower is disposed on a lower sideof the seat.
 8. The electric riding lawn mower of claim 1, wherein thewalking assembly comprises front wheels and rear wheels, the frontwheels are universal wheels, and a second electric motor is configuredto drive the rear wheels.
 9. The electric riding lawn mower of claim 1,wherein the electric motor assembly comprises a first motor for drivingthe mowing element to output power and a second motor for driving thewalking assembly, and the plurality of battery packs are configured topower the first motor and the second motor.
 10. An electric riding lawnmower, comprising: a main frame; a power output assembly comprising amowing element for outputting power to realize a mowing; a walkingassembly comprising a first travelling wheel and a second travellingwheel; an electric motor assembly configured to drive at least one ofthe power output assembly and the walking assembly; a plurality ofbattery compartments configured to detachably mount a plurality ofbattery packs; wherein the plurality of battery packs are configured topower the electric motor assembly, and at least one of the plurality ofbattery compartments is provided with a latch for locking at least oneof the plurality of battery packs, and at least one of the plurality ofbattery packs is configured to supply power to the electric motorassembly when mounted to the main frame, and to supply power to ahand-held power tool when removed from the main frame and electricallycoupled to the hand-held power tool.
 11. The electric riding lawn mowerof claim 10, further comprising a battery compartment housing, whereinthe battery compartment housing comprises a main body portion and acover, the main body portion is provided with the plurality of batterycompartments, and the cover is pivotally coupled to the main bodyportion.
 12. The electric riding lawn mower of claim 10, furthercomprising a seat mounted on the main frame, wherein at least one of theplurality of battery compartments is disposed at a rear side of theseat.
 13. The electric riding lawn mower of claim 10, wherein at leastone of the plurality of battery compartments is provided with a pop-upstructure for ejecting at least one of the plurality of battery packs.14. The electric riding lawn mower of claim 10, wherein each of theplurality of battery compartments is provided with a guiding structurefor guiding each of the plurality of battery packs inserted into each ofthe plurality of battery compartments.
 15. An electric vehicle,comprising, a main frame; a walking assembly configured to at leastdrive the electric vehicle to travel on a ground; a motor assemblyconfigured to drive the walking assembly; and a plurality of batterycompartments configured to detachably mount a plurality of battery packsused to power the motor assembly; wherein, when some of the plurality ofbattery compartments are installed with the battery packs and aremaining plurality of battery compartments are not installed with thebattery packs, the electric vehicle can be operated, and at least one ofthe plurality of battery packs is configured to supply power to theelectric motor assembly when mounted to the main frame, and to supplypower to a hand-held power tool when removed from the main frame andelectrically coupled to the hand-held power tool.
 16. The electricvehicle of claim 15, wherein, when all of the plurality of batterycompartments are installed with the battery packs and some of thebattery packs are depleted, the electric vehicle is configured to stilloperate.
 17. The electric vehicle of claim 15, wherein the plurality ofbattery compartments are further configured to use battery packs usablein other electric power tools.
 18. The electric vehicle of claim 17,wherein the other electric power tools are hand-push lawn mowers. 19.The electric vehicle of claim 15, further comprising a batterycompartment housing, wherein the battery compartment housing comprises amain body portion and a cover, the cover is pivotally coupled to themain body portion, the cover has an open state and a closed state, andthe plurality of battery compartments are opened and the user can insertthe plurality of battery packs into the plurality of batterycompartments when the cover is in the open state.
 20. The electricvehicle of claim 15, further comprising a seat mounted on the mainframe, wherein at least portion of the plurality of battery compartmentsare disposed at a rear side of the seat.